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Jan 3, 2024 · Prepare for your JavaScript interview with this comprehensive guide that covers data types, hoisting, operators, functions, and more. Download PDF or get a free personalized career roadmap from InterviewBit.
- Javascript - InterviewBit
Learn how to design scalable systems by practicing on...
- JavaScript Cheat Sheet: Basics to Advanced(2024) - InterviewBit
This article includes a JavaScript cheat sheet as well as...
- Javascript - InterviewBit
- JavaScript Fundamentals. Writing JavaScript code in an HTML page: We must enclose the JavaScript code within the
- Javascript Variables. Variables in JavaScript are simply names of storage locations. In other words, they can be considered as stand-in values that we can use to perform various operations in our JavaScript codes.
- Javascript Data Types. Different types of values and data can be stored in JavaScript variables. To assign values to JavaScript variables, you use the equals to "=" sign operator.
- JavaScript Operators. You can use variables to conduct a variety of tasks using JavaScript operators. The various types of operators in JavaScript are as follows
Learn how to design scalable systems by practicing on commonly asked questions in system design interviews.
- 📝Prerequisites
- Table of Contents 📜
- Javascript Array Methods 🧰
- Functional Programming in Javascript 🛠
- Objects in Javascript 🔮
- Asynchronous Javascript ⚡
- Advanced Javascript Concepts to Know
- Storage in Javascript 💾
- 🗃️ Main References
Basic knowledge of the web and programmingFamiliarity with HTML/CSS and JavaScript (especially ES6+ syntax)The most frequently used array methods in JS are: map, filter, find, reduce, and forEach. Let's cover map, filter, and forEach. You can explore more in this helpful article.
We have already used functions above. Let's cover them in more detail now. Just like how we used variables to store values, we can use functions to store a piece of code which we can reuse. You can make function in two ways: Now, let's cover some important concepts related to functions.
Just like arrays, objects are a way of storing data. We do so with the help of key-value pairs. name is the key and Raj is the value. Keys are generally the name of the properties of the object. We can store all sorts of data like functions inside an object. You can explore more here on the MDN.
So, JS is a single-threadedlanguage. Things happen one at a time. Only after one thing is done can we move to the next thing. But this creates problems in the real world, especially, when we are working with browsers. For example, when we need to fetch data from the web - often times we don't know how long will it take to get it. And whether we wil...
📚 Polyfills in JavaScript
1. Let's implement it for map: Notice how we use this. Here, we have basically created a new array and are adding values to it.
Async and defer in JavaScript ✔️
These concepts are frequently asked about in interviews by big corporations like Amazon, Walmart, and Flipkart. 🏢 To understand async and defer, we need to have an idea of how browsers render a webpage. First, they parse the HTML and CSS. Then DOM trees are created. From these, a render tree is created. Finally, from the render tree - a layout is created and the painting happens. For a more detailed look, check out this video. Async and defer are booleanattributes which can be loaded along w...
Debouncing in JavaScript ⛹️♂️
Debouncing is another favorite topic of interviewers. Let's understand it by creating a search bar. Demo: https://codesandbox.io/s/debounce-input-field-o5gml Create a simple input field in index.htmllike this: Now, in index.js. Don't forget to add it to index.htmlfirst: First, we have selected the input and added an event listenerto it. Then we created a debounce function which takes a callback function and delay. Now, inside the debounce function we create a timer using setTimeout. Now, this...
Finally, a small but important topic to wrap things up. localStorage:Data persists even after closing your session sessionStorage:You lose your data when your session is over, like when you close the browser on the tab. And we are done! 🏁 I hope you feel more confident about your next JS interview now. I wish you all the best. If you have any quer...
This repo consists of the Javascript solutions to the Interview Bit questions in the programming section.
Aug 31, 2022 · Learn how to solve JavaScript coding problems with examples and tips from a former navy SEAL and a public speaker. Use the memory palace method to remember important array methods and impress your interviewers.
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List of 1000 JavaScript Interview Questions. Contribute to sudheerj/javascript-interview-questions development by creating an account on GitHub.
